{"id":"CVE-2022-40896","aliases":["GHSA-mrwq-x4v8-fh7p","PYSEC-2023-117"],"url":"https://o3.security/vulnerability/CVE-2022-40896","summary":"Pygments vulnerable to ReDoS","details":"A ReDoS issue was discovered in pygments/lexers/smithy.py in pygments through 2.15.0 via SmithyLexer.","published":"2023-07-19T00:00:00Z","modified":"2026-09-09T11:45:11.586760297Z","cvss":{"score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},"epss":{"score":0.00519,"percentile":0.41887,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"pygments","fixedVersion":"2.15.0"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/pygments/pygments/blob/master/pygments/lexers/smithy.py#L61"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EZGMXALE3HSP4OXC7UUWIKX3OXKZDTY3/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VUZO4BQCIY2S2KZYHERQMKURB7AHXDBO/"},{"type":"WEB","url":"https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages-part-2/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/40xxx/CVE-2022-40896.json"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZGMXALE3HSP4OXC7UUWIKX3OXKZDTY3/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZO4BQCIY2S2KZYHERQMKURB7AHXDBO/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-40896"},{"type":"PACKAGE","url":"https://pypi.org/project/Pygments/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-09T11:45:11.586760297Z"}}